EP1174247B1 - Process for the production of an air suction housing of plastics parts by laser irradiation welding - Google Patents

Process for the production of an air suction housing of plastics parts by laser irradiation welding Download PDF

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Publication number
EP1174247B1
EP1174247B1 EP01116265A EP01116265A EP1174247B1 EP 1174247 B1 EP1174247 B1 EP 1174247B1 EP 01116265 A EP01116265 A EP 01116265A EP 01116265 A EP01116265 A EP 01116265A EP 1174247 B1 EP1174247 B1 EP 1174247B1
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EP
European Patent Office
Prior art keywords
plastics material
aperture
venturi
tubular
contact surfaces
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP01116265A
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German (de)
French (fr)
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EP1174247A1 (en
Inventor
Bernd Carolin
Ulrich Landersdorfer
Herbert Perschl
Christian Förg
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10354—Joining multiple sections together
    • F02M35/1036—Joining multiple sections together by welding, bonding or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • B29C66/612—Making circumferential joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10144—Connections of intake ducts to each other or to another device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10314—Materials for intake systems
    • F02M35/10321—Plastics; Composites; Rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/749—Motors
    • B29L2031/7492—Intake manifold

Definitions

  • the invention relates according to the preamble of claim 1 to a method for producing an air collector housing made of plastic parts by means of laser transmission welding.
  • air collector housings for engines including structurally integrated air funnels, in particular in the embodiment as vibration tubes, are each made of a plastic to achieve a low structural weight, the design of the connection of interpenetrating, differently shaped plastic parts is of particular interest.
  • German patent DE 32 19 699 C2 serving for an internal combustion engine, made of plastic air collector housing known in its interior arranged air funnels or vibrating tubes, the connection to the engine side wall through openings of the collector housing are arranged passing.
  • the housing of the air collector is blown around that of the housing formed to enclosing part of the venturi around and shrunk on the connection-side ends to the respective fixation.
  • this design is simple-shaped air collector housing.
  • the air collector housing on the other hand be formed on its outside with an additional container, as is known for example from German patent application DE 102 17 617 A1, it may be expedient for manufacturing reasons, at least two parts form the collector housing and the air funnel or vibrating tubes separately in one of To arrange collector housing parts. This type is z. B. from German Patent DE 25 27 774 C2 per se known.
  • the invention has for its object to provide a method for the production of a multi-part, made of plastic air collector housing arranged in the interior, also made of a plastic venturi, with a rigid and tight connection between the venturi and a header housing part without geometry changes In the flow direction bump-free transitions in the area of cohesively connected components is achieved.
  • Advantage of the invention is the combination of a gas-tight connection serving laser welding connection with a remaining arranged clamping device for the advantageous distribution of mechanical loads in both plastic parts.
  • the two dynamically stressed plastic parts such as the air collector housing and the air funnel are additionally secured in a simple manner in their mutual position beyond the laser welding process.
  • each air funnel is equipped on the motor connection side with a rubber-like decoupling element which, by means of a hose clamp, fixes the position of the clamping device designed as a union nut.
  • Plastic parts 1 and 2 in the design as air collector housing 3 and venturi 4 passing through one another are materially connected to one another in a production process by means of a laser transmission method in the area of penetration.
  • Collector housing 3 and air funnel 4 are braced against each other through the corresponding contact surfaces 5 and 6 by means of a clamping device 7 before the penetration welding, and this tension is maintained during the laser welding.
  • the tubular plastic part 2 and 4 aussenumfhacklich in the opening 8 of the other plastic part 1 and 3 with a the wall of the tubular plastic part 2 and 4 of a inwardly outwardly radiating laser beam materially connected.
  • both plastic parts 1 and 2 or 3 and 4 on the one hand the opening 8 in areas of corresponding stops 9, 9 'contact surfaces 5, 6, by means of a the other part of the opening 8, the two Plastic parts 1 and 2 or 3 and 4 arranged mutually bracing, remaining clamping device 7 are pressed against each other and then laser welded.
  • a positionally accurate arrangement of the air funnel 4 in the air collector housing 3 is achieved in an advantageous manner that the stops 9, 9 'at least partially have a frustoconical contour, wherein the contact surface of the spatially curved, tubular plastic part 2 and 4 formed on a circumferential ring 11 is, on the other side of the opening 8 in the hollow-shaped plastic part 1 on the tubular plastic part 2 and 4, a thread 12 is associated with a union nut 13 as a clamping device 7.
  • each spatial, designed as venturi 4 plastic part 2 motor terminal side is equipped with a rubber-like decoupling element 14 for acoustic and vibration damping decoupling between air collector housing 3 and not shown internal combustion engine, wherein the decoupling element 14 by means of a hose clamp 15 fixes the position assurance the designed as a union nut 13 clamping device 7 is used.
  • corrugated spring rings or plate spring-like rings may be provided in addition to the union nut 13 formed of plastic.
  • the creep behavior of plastic compounds is advantageously avoided with the invention. Furthermore, reliable sealing of plastic connections is achieved with high process reliability. Finally, despite a reduction in costs, a high degree of constructive freedom results, whereby changes in geometry, in particular with the laser transmission welding, are avoided, which is of great advantage in particular in the case of plastic parts through which flow passes.

Abstract

An arrangement for laser welding two plastic components comprises welding the outer circumference of a tubular plastic component (2, 4) into the penetration (8) of a second plastic component (1, 3). The laser beam is directed outwardly, from the interior of the tubular component.

Description

Die Erfindung bezieht sich nach dem Oberbegriff des Patentanspruches 1 auf ein Verfahren zum Herstellen eines Luftsammlergehäuses aus Kunststoffteilen mittels Laser- Durchstrahlschweißung.The invention relates according to the preamble of claim 1 to a method for producing an air collector housing made of plastic parts by means of laser transmission welding.

Bekanntlich werden Luftsammlergehäuse für Kraftmaschinen einschließlich baulich integrierter Lufttrichter, insbesondere in der Ausgestaltung als Schwingrohre, zur Erzielung eines geringen Baugewichtes jeweils aus einem Kunststoff gebildet, wobei die Gestaltung der Verbindung von einander durchdringenden, unterschiedlich gestalteten Kunststoffteilen von besonderem Interesse ist.As is known, air collector housings for engines including structurally integrated air funnels, in particular in the embodiment as vibration tubes, are each made of a plastic to achieve a low structural weight, the design of the connection of interpenetrating, differently shaped plastic parts is of particular interest.

In dem Dokument Patent Abstracts of Japan, vol 009, no.194, (M-403) (10.8.1985) & JP-A- 60 060497 ist anhand der einzigen Figur des Abstracts das Verschweißen eines Rohres mit einer Wandung gezeigt und beschrieben, wobei ein Rohr über eine Durchbrechung eine Wandung durchsetzend angeordnet wird und hierauf das rohrartige Teil außenumfänglich in der Durchbrechung mit einem die Wandung des rohrartigen Teiles von innen nach außen durchstrahlenden Laserstrahl stoffschlüssig verbunden wird.In the document Patent Abstracts of Japan, vol 009, no.194, (M-403) (10.8.1985) & JP-A-60 060497 the welding of a pipe with a wall is shown and described with reference to the single figure of the abstract, wherein a tube is arranged passing through an opening through a wall and then the tube-like part is peripherally circumferentially in the opening with a wall of the tubular part from the inside to the outside radiating laser beam materially connected.

Ferner ist aus dem deutschen Patent DE 32 19 699 C2 ein für eine Brennkraftmaschine dienendes, aus Kunststoff gefertigtes Luftsammlergehäuse bekannt mit in dessen Innerem angeordneten Lufttrichtern bzw. Schwingrohren, die zur Brennkraftmaschine anschlussseitig einen Wandabschnitt über Durchbrechungen des Sammlergehäuses durchsetzend angeordnet werden. Das Gehäuse des Luftsammlers wird im Blasverfahren um das von dem Gehäuse zu umschließenden Teil der Lufttrichter herum geformt und auf deren anschlussseitigen Enden zur jeweiligen Fixierung aufgeschrumpft. Zweckmäßig ist diese Gestaltung bei einfach geformtem Luftsammlergehäuse.Furthermore, from the German patent DE 32 19 699 C2 serving for an internal combustion engine, made of plastic air collector housing known in its interior arranged air funnels or vibrating tubes, the connection to the engine side wall through openings of the collector housing are arranged passing. The housing of the air collector is blown around that of the housing formed to enclosing part of the venturi around and shrunk on the connection-side ends to the respective fixation. Appropriately, this design is simple-shaped air collector housing.

Soll das Luftsammlergehäuse dagegen an seiner Außenseite mit einem Zusatzbehältnis ausgebildet werden, wie dies beispielsweise aus der deutschen Offenlegungsschrift DE 102 17 617 A1 bekannt ist, kann es aus Herstellungsgründen zweckmäßig sein, das Sammlergehäuse zumindest zweiteilig auszubilden und die Lufttrichter bzw. Schwingrohre gesondert in einem der Sammlergehäuseteile anzuordnen. Diese Bauart ist z. B. aus der deutschen Patentschrift DE 25 27 774 C2 per se bekannt.If the air collector housing on the other hand be formed on its outside with an additional container, as is known for example from German patent application DE 102 17 617 A1, it may be expedient for manufacturing reasons, at least two parts form the collector housing and the air funnel or vibrating tubes separately in one of To arrange collector housing parts. This type is z. B. from German Patent DE 25 27 774 C2 per se known.

Der Erfindung liegt die Aufgabe zugrunde, für die Herstellung eines mehrteiligen, aus Kunststoff gebildeten Luftsammlergehäuses mit einem in dessen Innerem angeordneten, ebenfalls aus einem Kunststoff gefertigten Lufttrichter ein Verfahren aufzuzeigen, mit dem eine starre und dichte Verbindung zwischen dem Lufttrichter und einem Sammlergehäuseteil ohne Geometrieveränderungen mit in Strömungsrichtung stoßfreien Übergängen im Bereich der miteinander stoffschlüssig verbundenen Bauteile erzielt wird.The invention has for its object to provide a method for the production of a multi-part, made of plastic air collector housing arranged in the interior, also made of a plastic venturi, with a rigid and tight connection between the venturi and a header housing part without geometry changes In the flow direction bump-free transitions in the area of cohesively connected components is achieved.

Diese Aufgabe ist mit dem Patentanspruch 1 gelöst.This object is achieved by claim 1.

Vorteil der Erfindung ist die Kombination einer der gasdichten Verbindung dienende Laser-Schweißverbindung mit einer verbleibend angeordneten Spanneinrichtung zur vorteilhaften Verteilung mechanischer Belastungen in beiden Kunststoffteilen. Weiter sind damit insbesondere die beiden dynamisch beanspruchten Kunststoffteile wie Luftsammlergehäuse und Lufttrichter in ihrer gegenseitigen Lage über den Laser-Schweißvorgang hinaus zusätzlich auf einfache Weise gesichert.Advantage of the invention is the combination of a gas-tight connection serving laser welding connection with a remaining arranged clamping device for the advantageous distribution of mechanical loads in both plastic parts. Furthermore, in particular the two dynamically stressed plastic parts such as the air collector housing and the air funnel are additionally secured in a simple manner in their mutual position beyond the laser welding process.

Eine durch einfachen Aufbau vorteilhafte Ausgestaltung mit hoher Betriebssicherheit bezüglich Dichtheit einerseits und starrer Verbindung andererseits ist gemäß einem weiteren Vorschlag dadurch erreicht, dass die Anschläge zumindest abschnittsweise mit einer kegelstumpfartigen Kontur ausgebildet werden, wobei die Kontaktfläche eines räumlich gekrümmten Lufttrichters an einem umlaufenden Ring angeordnet wird, dem jenseits der Durchbrechung am Lufttrichter ein Gewinde für eine zum Verbleib nach der Laser-Durchstrahlschweißung vorgesehene Überwurfmutter als Spanneinrichtung zugeordnet wird.
Mit dieser erfindungsgemäßen Ausgestaltung wird in vorteilhafter Weise mittels einer Schraubeinrichtung bei entsprechend gewähltem Kegelmantel der kegelstumpfartigen Konturen eine hohe Pressung zwischen den korrespondierenden Kontaktflächen erzielt, womit in weiterer vorteilhafter Weise eine Laserschweißung von hoher Qualität erzielt wird.An advantageous by simple design configuration with high reliability in terms of tightness on the one hand and rigid connection on the other hand is achieved according to a further proposal in that the attacks at least partially formed with a truncated cone-like contour, wherein the contact surface of a spatially curved air funnel is disposed on a circumferential ring, which is assigned beyond the opening on the air vent a thread for a whereabouts after the laser transmission welding provided union nut as a clamping device.
With this embodiment of the invention, a high pressure between the corresponding contact surfaces is achieved in an advantageous manner by means of a screw with appropriately selected conical surface of the truncated conical contours, which in a further advantageous manner, a laser welding of high quality is achieved.

In weiterer Ausgestaltung des Herstellverfahrens wird vorgeschlagen, dass jeder Lufttrichter motoranschlussseitig mit einem gummiartigen Entkoppelungselement ausgerüstet wird, das mittels einer Schlauchschelle fixiert der Lagesicherung der als Überwurfmutter gestalteten Spanneinrichtung dient. Mit dieser Ausgestaltung wird ohne zusätzlichem Aufwand die Lagesicherung der Spanneinrichtung gewährleistet.In a further embodiment of the manufacturing process, it is proposed that each air funnel is equipped on the motor connection side with a rubber-like decoupling element which, by means of a hose clamp, fixes the position of the clamping device designed as a union nut. With this configuration, the position assurance of the clamping device is ensured without additional effort.

Das erfindungsgemäße Herstellverfahren für ein Luftsammlergehäuse ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels beschrieben.The manufacturing method according to the invention for an air collector housing is described with reference to an embodiment shown in the drawing.

Einander durchsetzend angeordnete Kunststoffteile 1 und 2 in der Ausgestaltung als Luftsammlergehäuse 3 und Lufttrichter 4 werden in einem Herstellverfahren mittels Laser-Durchstrahlverfahren im Bereich der Durchsetzung miteinander stoffschlüssig verbunden. Sammlergehäuse 3 und Lufttrichter 4 werden vor der Durchstrahlschweißung über korrespondierende Kontaktflächen 5 und 6 mittels einer Spanneinrichtung 7 gegeneinander verspannt, und diese Verspannung wird während der Laserschweißung aufrechterhalten.Plastic parts 1 and 2 in the design as air collector housing 3 and venturi 4 passing through one another are materially connected to one another in a production process by means of a laser transmission method in the area of penetration. Collector housing 3 and air funnel 4 are braced against each other through the corresponding contact surfaces 5 and 6 by means of a clamping device 7 before the penetration welding, and this tension is maintained during the laser welding.

Wie aus der einzigen Zeichnung ersichtlich, ist zumindest ein räumlich gekrümtes, rohrartiges Kunststoffteil 2 bzw. der Lufttrichter 4 das weitere, hohlgestaltete Kunststoffteil 1 bzw. das Luftsammlergehäuse 3 über eine Durchbrechung 8 durchsetzend angeordnet. Zur Erzielung einer einwandfreien Schweißverbindung zwischen den beiden Kunststoffteilen 1 und 2 bzw. 3 und 4 ist das rohrartige Kunststoffteil 2 bzw. 4 aussenumfänglich in der Durchbrechung 8 des weiteren Kunststoffteiles 1 bzw. 3 mit einem die Wandung des rohrartigen Kunstoffteiles 2 bzw. 4 von einem innen nach außen durchstrahlenden Laserstrahl stoffschlüssig verbunden.As can be seen from the single drawing, at least one spatially curved, tube-like plastic part 2 or the air funnel 4, the further, hollow-shaped plastic part 1 and the air collector housing 3 through an opening 8 arranged by passing. To achieve a perfect weld between the two plastic parts 1 and 2 or 3 and 4, the tubular plastic part 2 and 4 aussenumfänglich in the opening 8 of the other plastic part 1 and 3 with a the wall of the tubular plastic part 2 and 4 of a inwardly outwardly radiating laser beam materially connected.

Um bei dieser Anordnung von unterschiedlich gestalteten, insbesondere dynamisch beanspruchten Kunststoffteilen 1 und 2 bzw. 3 und 4 deren relative Lage zueinander über den Laser-Schweißvorgang hinaus zusätzlich auf einfache Weise zu sichern, ist eine an den Kunststoffteilen 1, 2 zum Verbleib nach der Laserschweißung gestaltete Spanneinrichtung 7 gewählt.In order to additionally secure in a simple manner in this arrangement of differently shaped, in particular dynamically stressed plastic parts 1 and 2 or 3 and 4 to each other beyond the laser welding process addition, one to the plastic parts 1, 2 to remain after the laser welding designed clamping device 7 selected.

In bevorzugter Ausgestaltung weisen beide Kunstoffteile 1 und 2 bzw. 3 und 4 einerseits der Durchbrechung 8 in Bereichen korrespondierender Anschläge 9, 9' Kontaktflächen 5, 6 auf, die mittels einer andererseits der Durchbrechung 8 die beiden Kunststoffteile 1 und 2 bzw. 3 und 4 gegenseitig verspannend angeordneten, verbleibenden Spanneinrichtung 7 gegeneinander gepresst und dann lasergeschweißt sind.In a preferred embodiment, both plastic parts 1 and 2 or 3 and 4 on the one hand the opening 8 in areas of corresponding stops 9, 9 'contact surfaces 5, 6, by means of a the other part of the opening 8, the two Plastic parts 1 and 2 or 3 and 4 arranged mutually bracing, remaining clamping device 7 are pressed against each other and then laser welded.

Eine positionsgenaue Anordnung der Lufttrichter 4 in dem Luftsammlergehäuse 3 ist in vorteilhafter Weise dadurch erreicht, dass die Anschläge 9, 9' zumindest abschnittsweise eine kegelstumpfartige Kontur aufweisen, wobei die Kontaktfläche des räumlich gekrümten, rohrartigen Kunststoffteiles 2 bzw. 4 an einem umlaufenden Ring 11 ausgebildet ist, dem jenseits der Durchbrechung 8 im hohlgestalteten Kunststoffteil 1 am rohrartigen Kunstoffteil 2 bzw. 4 ein Gewinde 12 für eine Überwurfmutter 13 als Spanneinrichtung 7 zugeordnet ist.A positionally accurate arrangement of the air funnel 4 in the air collector housing 3 is achieved in an advantageous manner that the stops 9, 9 'at least partially have a frustoconical contour, wherein the contact surface of the spatially curved, tubular plastic part 2 and 4 formed on a circumferential ring 11 is, on the other side of the opening 8 in the hollow-shaped plastic part 1 on the tubular plastic part 2 and 4, a thread 12 is associated with a union nut 13 as a clamping device 7.

Weiter ist aus der Zeichnung zu erkennen, dass jedes räumliche, als Lufttrichter 4 gestaltete Kunststoffteil 2 motoranschlussseitig mit einem gummiartigen Entkoppelungselement 14 zur akustischen und schwingungsdämpfenden Entkoppelung zwischen Luftsammlergehäuse 3 und nicht dargestellter Brennkraftmaschine ausgerüstet ist, wobei das Entkoppelungselement 14 mittels einer Schlauchschelle 15 fixiert der Lagesicherung der als Überwurfmutter 13 gestalteten Spanneinrichtung 7 dient.Further, it can be seen from the drawing that each spatial, designed as venturi 4 plastic part 2 motor terminal side is equipped with a rubber-like decoupling element 14 for acoustic and vibration damping decoupling between air collector housing 3 and not shown internal combustion engine, wherein the decoupling element 14 by means of a hose clamp 15 fixes the position assurance the designed as a union nut 13 clamping device 7 is used.

Bei dem vorbeschriebenen Ausführungsbeispiel genügen eine formschlüssige Verbindung zwischen Lufttrichter 4 und Luftsammlergehäuse 3 über eine konische Zentrierung sowie eine kraftschlüssige Verbindung durch Zentralverschraubung mittels einer Überwurfmutter 13 bezüglich Dauerhaltbarkeit und Dichtigkeit wegen des bekannten Kriechverhaltens von Kunststoffen unter Temperatur- und Krafteinwirkung alleine nicht, so dass zusätzlich ein Laserschweißverfahren hinzutritt zur stoffschlüssigen Verbindung des Lufttrichters 4 mit dem Luftsammlergehäuse 3. Für eine hohe Schweißnahtgüte ist neben der vorgeschlagenen Laser-Durchstrahlschweißung eine gleichmäßige Pressung der korrespondierenden Kontaktflächen 5, 6 unerlässlich, die mittels der Überwurfmutter 13 in den kegeligen Kontaktflächen 5 und 6 jedoch auf einfache Weise erzielt ist.In the above-described embodiment satisfy a positive connection between venturi 4 and air collector housing 3 via a conical centering and a non-positive connection by Zentralverschraubung means of a union nut 13 with respect to durability and tightness because of the known creep behavior of plastics under temperature and force alone not, so that in addition For a high Schweißnahtgüte a uniform pressure of the corresponding contact surfaces 5, 6 is essential in addition to the proposed laser transmission welding, by means of the union nut 13 in the conical contact surfaces 5 and 6, however, to simple Way is achieved.

Als Spanneinrichtung 7 können neben der aus Kunststoff gebildeten Überwurfmutter 13 auch gewellte Federringe oder tellerfederartige Ringe vorgesehen sein.As a clamping device 7, corrugated spring rings or plate spring-like rings may be provided in addition to the union nut 13 formed of plastic.

Mit der Erfindung ist in vorteilhafter Weise das Kriechverhalten von Kunstoffverbindungen vorteilhaft umgangen. Weiter sind bei hoher Prozesssicherheit zuverlässige Abdichtungen von Kunststoffverbindungen erzielt. Schließlich ergibt sich trotz Kostenreduzierung ein hoher konstruktiver Freiheitsgrad, wobei insbesondere mit dem Laser-Durchstrahlschweißen Geometrieveränderungen vermieden sind, was insbesondere bei durchströmten Kunststoffteilen von großem Vorteil ist.Advantageously, the creep behavior of plastic compounds is advantageously avoided with the invention. Furthermore, reliable sealing of plastic connections is achieved with high process reliability. Finally, despite a reduction in costs, a high degree of constructive freedom results, whereby changes in geometry, in particular with the laser transmission welding, are avoided, which is of great advantage in particular in the case of plastic parts through which flow passes.

Claims (3)

  1. A method of producing an intake plenum casing from plastics material parts by laser beam welding,
    wherein a tubular plastics material part (2) of the intake plenum casing (3) is inserted through a second wall-like plastics material part (1) of the casing (3) substantially without clearance through an aperture (8) in the plastics material part (1), and
    the two plastics material parts (1, 2) are held clamped to one another via contact surfaces (5, 6) for autogenously connecting and welded by laser, such that
    the outer periphery of the tubular plastics material part (2) in the aperture (8) in the wall-like plastics material part (1) is autogenously connected by a laser beam outwardly through the wall of the tubular plastics material part (2),
    characterised in that
    the wall-like plastics material part (1) is a two-part intake plenum casing (3) for an internal combustion engine and the tubular part (2) is a venturi (4) which extends through a separate part of the casing (3) via the aperture (8), the construction being such that
    the two plastics material parts (1, 2 or 3, 4) are welded together on one side of the aperture (8) at contact surfaces (5, 6) disposed in the region of corresponding abutments (9, 9'), wherein
    the two plastics material parts (1, 2 or 3, 4) are pressed against one another by a clamping device (7) disposed on the other side of the aperture (8) for the purpose of laser welding at the contact surfaces (5, 6).
  2. A method according to claim 1, characterised in that the abutments (9, 9') at least in part are given a frusto-conical contour, wherein
    the contact surfaces (5) of a venturi (4) curved in three dimensions are disposed in a peripheral ring (11), associated
    on the other side of the aperture (8) with a screw thread (12) on the venturi (4) for a clamping device (7) in the form of a cap nut (13) so that it remains after the laser beam welding.
  3. A method according to claim 2, characterised in that each venturi (4), on the side connected to the engine, is connected to a rubber uncoupling element (14) fixed by a hose band clip (15) so as to secure the clamping device (7) in the form of a cap nut (13) in position.
EP01116265A 2000-07-17 2001-07-05 Process for the production of an air suction housing of plastics parts by laser irradiation welding Expired - Lifetime EP1174247B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10034678A DE10034678A1 (en) 2000-07-17 2000-07-17 Arrangement for the integral connection of plastic parts by means of laser welding
DE10034678 2000-07-17

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EP1174247A1 EP1174247A1 (en) 2002-01-23
EP1174247B1 true EP1174247B1 (en) 2006-03-01

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AT (1) ATE318692T1 (en)
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DE10000289B4 (en) * 2000-01-07 2005-10-13 Hella Kgaa Hueck & Co. Pipe for providing a washing liquid in a windscreen washer system for motor vehicles
US20030111039A1 (en) * 2001-12-18 2003-06-19 Siemens Vdo Automotive, Inc Method and apparatus for laser welding hoses in an air induction system
US20030150844A1 (en) * 2002-02-14 2003-08-14 Siemens Vdo Automotive, Inc. Method and apparatus for laser welding hoses in an air induction system
US7191749B2 (en) 2003-07-07 2007-03-20 Siemens Canada Limited Laser welded intake manifold
US7191750B2 (en) * 2004-04-06 2007-03-20 Siemens Canada Limited Laser welded manifold
US7455745B2 (en) 2005-06-03 2008-11-25 Mahle International Gmbh Laser welding of a plastic manifold
DE102010046194A1 (en) * 2010-09-23 2012-03-29 Mann + Hummel Gmbh Suction tube for combustion gas of internal combustion engine, particularly motor vehicle, has inlet for suction of combustion gas, where inlet is arranged in housing portion of tube

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DE3219699C2 (en) * 1982-05-26 1984-07-05 Knecht Filterwerke Gmbh, 7000 Stuttgart Air collector for power adjustment for an internal combustion engine
JPS6060497A (en) * 1983-09-12 1985-04-08 Hitachi Ltd Airtight securing process of dual tube plate type heat exchanger
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DE10034678A1 (en) 2002-01-31
ES2260125T3 (en) 2006-11-01
EP1174247A1 (en) 2002-01-23
DE50109036D1 (en) 2006-04-27
ATE318692T1 (en) 2006-03-15

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